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The amounts of money requested on home loan applications at Down River Federal Savings follow the normal distribution, with a mean of $70,000 and a standard deviation of $20,000. A loan application is received this morning. What is the probability:
a. The amount requested is $80,000 or more?b. The amount requested is between $65,000 and $80,000?c. The amount requested is $65,000 or more?
It does not matter, when data are skewed mean and median are the same.
A company wants to know if minorities are more likely to be in certain job categories than others. Their data base codes employees 1 for clerical, 2 for custodial, and 3 for manager. A logistic equation was fit to the data with SPSS.
Advertisers need to know which age groups are likely to see their ads. Purchasers of 120 copies of Cosmopolitan are shown by age group.
Industry standards suggest that 13 percent of new vehicles require warranty service within the first year. Compute the mean and standard deviation of this probability distribution.
A scatter plot and regression line can be used for all of the following EXCEPT
Compare the means of two populations using 96% confidence interval:
If the monthly demand for videos on average is 180 and standard deviation = 60, what is the number of videos the manager should order to meet 90% customer demand?
Based on this data can the college conclude that the students in the new program performed better than the rest of the class> A one-tailed test is used equalling .05
When coaching or training athletes, the tests employed to predict performance or determine training methods incorporate statistical methods. Why are these methods so effective?
A random sample of 90 printers discovered that 25 of them were being used in small businesses. Find the 95% limit for the population proportion of printers that are used in small buisnesses.
A biased coin with probability of head being .6 is tossed 12 times. What is the probability that number of head would more than 4 but less than or equal to 10.
For each of the following three scenarios, state which hypothesis test you would use from among the four introduced so far: the z test, the single-sample t test, the paired-samples t test, and the independent-samples t test.
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